Pulley, Quadruple Parallel Plastic with Metal Housing

GSC International 4-16064 Quadruple Parallel Pulley, Plastic This black plastic pulley has four wheels in parallel that are 50mm in diameter. It has a metal housing and hooks at the top and the bottom. Four-Wheel Parallel Design – Features 4 plastic wheels aligned side by side for exploring compound pulley systems and balanced load distribution. Sturdy Metal Frame – Rugged metal housing ensures durability and stability during repeated classroom use and experimentation. Perfect for Physics Labs – Supports lessons on mechanical advantage, force redirection, and Newtonian mechanics through hands-on engagement. Smooth, Low-Friction Operation – Plastic wheels rotate freely for efficient demonstrations and accurate results in experiments. ⚠️ Proposition 65 Warning for California Residents: WARNING: This product may expose you to chemicals including styrene and/or bisphenol A (BPA), which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.